Created by StemPy LabA chemist adds a tiny amount of arsenic to a crystal of pure silicon. Arsenic is in group 15, so each of its atoms has five outer electrons. Four of them join the bonds of the neighbouring silicon atoms. What does the crystal become?
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← Compared with the fission of uranium-235, the fusion of deuterium and tritium gives, for the same mass of fuel,In a pure crystal of germanium at room temperature, an electron leaves the valence band and moves into the conduction band. What stays behind in the valence band, and how does it behave? →
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